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Details of issue NIXPKGS-2026-0842

NIXPKGS-2026-0842
published on
Permalink CVE-2026-31950
5.3 MEDIUM
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): High (H)
  • Privileges Required (PR): Low (L)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): High (H)
  • Integrity (I): None (N)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): High (H)
  • Modified Privileges Required (MPR): Low (L)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): None (N)
  • Modified Availability (MA): None (N)
updated 1 month, 3 weeks ago by @mweinelt Activity log
  • Created suggestion 1 month, 3 weeks ago
  • @mweinelt accepted 1 month, 3 weeks ago
  • @mweinelt published on GitHub 1 month, 3 weeks ago
LibreChat's IDOR in SSE Stream Subscription Allows Reading Other Users' Chats

LibreChat is a ChatGPT clone with additional features. In versions 0.8.2-rc2 through 0.8.2-rc3, the SSE streaming endpoint `/api/agents/chat/stream/:streamId` does not verify that the requesting user owns the stream. Any authenticated user who obtains or guesses a valid stream ID can subscribe and read another user's real-time chat content, including messages, AI responses, and tool invocations. Version 0.8.2 patches the issue.

Affected products

LibreChat
  • ==>= 0.8.2-rc2, < 0.8.2

Matching in nixpkgs

pkgs.librechat

Open-source app for all your AI conversations, fully customizable and compatible with any AI provider

Package maintainers

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-f6rf-vm44-wh5g